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Article
Mechanical Properties of Composite Rods Produced by Hot Gas Extrusion of the Nickel and Aluminum Powder Mixtures in a Steel Shell
Abstract—This paper presents the effect of hot gas extrusion (HGE) parameters on the phase composition and mechanical properties of composite rods composed of a core with reaction products of a Ni–Al powder mixtu...
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Article
Features of Initiation and Combustion of Hf/PTFE Reactive Materials
The optimum composition of components in the Hf/PTFE system was determined by thermodynamic calculation. The composition 65Hf/35PTFE (in wt %) was chosen based on the maximum adiabatic combustion temperature (Tad
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Article
Structure and Phase Formation in Ni + Al Powder Mixture Enclosed in a Steel Cartridge during Hot Gas Extrusion
Stages of structure/phase formation in Ni + Al powder mixture enclosed in a steel cartridge in the course of hot gas extrusion (HGE) were studied. It was shown that the formation of target NiAl phase is preced...
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Article
Synthesis of TiС–ZrC Composite with Submicron Structure by Electro-Thermal Explosion under Pressure
Ultra-high-temperature TiC–ZrC composites with submicron structure were synthesized by electro-thermal explosion (ETE) under pressure. The precursors for synthesis were prepared from a mixture containing Ti, Z...
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Article
Brass–Invar Bimetal Interface in the Joint Formed by Explosive Welding
The structure, morphology, microhardness, and tear strength of the L63 brass–36N invar welded joint fabricated by explosive welding are investigated. The shape of the joint interface is wavy with stable parame...
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Article
Properties of the Surface Layer after High-Energy Treatment by Powder Particles
Experiments on the high-energy surface treatment of a substrate made of St.3 structural steel by the flow of particles of tungsten, nickel, and titanium nitride particles are performed. The collision pressure ...
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Article
Study of the Features of Obtaining Bimetallic Pipes and Rods by Explosion Welding with Subsequent Hot Deformation
In this paper, we study the features of obtaining bimetallic pipes and rods using explosion welding and subsequent hot deformation. Explosion welding allowed obtaining continuous cylindrical two-layer billets ...
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Article
Efficiency of Vanadium Barrier Layer in a Stainless Steel–Titanium Bimetal at a High Temperature
The efficiency of using a vanadium barrier layer and a bimetallic composition composed of 08Kh18N10T stainless steel + VT1-0 titanium obtained by means of explosion welding in order to prevent occurrence of an...
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Article
Explosive Compaction of Ni–Mg Master Alloys
The compacts produced from Ni–Mg metal powders by explosion and intended for commercial alloying of wear- and heat-resistant steels, cast irons, and special-purpose alloys are investigated. The optimum paramet...
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Article
Shock-Wave Initiation of Exothermic Reactions in W–Al–PTFE Reactive Materials
Thermodynamic calculations of the adiabatic temperatures and probable compositions of the combustion products in the W–PTFE and W–Al–PTFE systems were performed. Powdered reactive compacts were produced. The s...
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Article
The Use of Gas Extrusion for the Synthesis of a High-Strength Composite Based on a 5xxx Series Aluminum Alloy Strengthened with Carbon Nanostructures
Composite materials based on a 5xxx series aluminum alloy strengthened with 0.1 wt % of multiwalled carbon nanotubes (MWCNTs) or 0.1 wt % WC1 –x/MWCNTs were synthesized by high-energy ball milling and subsequent ...
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Article
Influence of Explosive Welding Parameters on the Structure of Interface in Brass–Invar Thermobimetal
The influence of kinematic parameters of explosive welding of brass L63 with Invar 36N on the quality of the layers and the structure of the welding zone of thermobimetal grade TB 1353 (TB 130/17) was experime...
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Article
Self-Propagating High-Temperature Synthesis of MgAl2O4 Spinel
Magnesium aluminate spinel, MgAl2O4, has been prepared by self-propagating high-temperature synthesis (SHS) in the MgO–Al2O3–Mg(NO3)2 ∙ 6H2O–Al–B system. The composition and structure of the synthesis product hav...
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Article
Shock-Induced Chemical Transformations in Ti–B–Ni and Ti–C–Ni Powder Blends
Shock-induced chemical transformations in Ti–B–Ni and Ti–C–Ni powder blends were explored by XRD and EDS methods (flyer velocities 1000 and 1500 m/s). The blends based on Ti–C showed lower sensitivity to shock...
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Article
High-Temperature Gas Extrusion of a Reactive Ni + Al Powder Mixture
The results of studying steel cladded intermetallic rods manufactured by means of high-temperature gas extrusion applied for the first time for reactive powder mixtures are presented. The tests were performed ...
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Article
Gas Release during Combustion of W–Teflon–Al Mixtures
For W–Tf–Al mixtures, we investigated the behavior of burning velocity, gas evolution parameters, and composition of combustion products as a function of green composition and green density. Aluminum was used ...
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Article
Effect of Mechanical Activation on Thermally and Shock Wave Initiated Reactions of Refractory Metals with Teflon
We have studied ignition and structure formation processes in powder mixtures of refractory metals, Teflon, and energetic additives. Tungsten or tantalum has been used as a component of the mixtures in order t...
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Article
Ignition of Some Powder Mixtures of Metals with Teflon
The dependence of ignition and the formation of the product structure in powder mixtures of W–Ti, Ti–B, Ti–Cu, and Ni–Al metals with Teflon (Tf) on the blending method and heating rate is studied. The increase...
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Article
Reverse Schemes of Explosive Cladding of Long-Length Pipe Billets
The present work is aimed at solving an important problem: premature failure of a critical element of downhole equipment, such as the pump-compressor pipe. For performance improvement, we propose to clad the i...
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Article
Preparation of Bimetal with Good Dam** Properties
It is shown that explosive welding may be used to create bimetal material exhibiting simultaneously high strength and good dam** capacity. Bimetal strength is provided due to a layer of high-strength high-q...
